Mary A Fraley

US Patent:

6349025, Feb 19, 2002

Filed:

Oct 25, 2000

Appl. No.:

09/696601

Inventors:

Mary A. Fraley - Minnetonka MN
Ronald F. Hoch - Andover MN
Dale W. Schak - Maplewood MN
Lynn M. Seifried - Minneapolis MN
William D. Wolf - St. Louis Park MN

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 435

US Classification:

361302, 3613061

Abstract:

A filtered feedthrough that does not block passage of gas in a helium leak test and enables testing of the hermeticity of the feedthrough while inhibiting high voltage arcing is disclosed in single filtered feedthrough and multiple filtered feedthrough array configurations. Each filtered feedthrough comprises a ferrule, an insulator, a feedthrough pin, a filter element, and a pre-formed insulative barrier or spacer located in an interior space between the feedthrough insulator and the filter element rather than a non-conductive adhesive filling the interior space. A gas flow path or pathway extends from the interior space to the exterior of the feedthrough bypassing each filter element. Any leak test gas applied in a hermeticity test and passing through defects in the feedthrough insulator or its attachment to the feedthrough pin or ferrule enters the interior space. The gas pathway extends from an interior space through one or more side wall hole of the ferrule and/or through one or more gap between the ferrule interior surface and the outer surface of the filter element.

US Patent:

6414835, Jul 2, 2002

Filed:

Mar 1, 2000

Appl. No.:

09/515385

Inventors:

William D. Wolf - St. Louis Park MN
James Strom - Arden Hills MN
Craig L. Wiklund - Bloomington MN
Mary A. Fraley - Minnetonka MN
Lynn M. Seifried - Minneapolis MN
James E. Volmering - Phoenix AZ
Patrick F. Malone - Phoenix AZ
Samuel F. Haq - Mesa AZ

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 435

US Classification:

361302, 361303, 3613063, 361311, 607 5

Abstract:

A capacitive filtered feedthrough assembly is formed in a solid state manner to employ highly miniaturized conductive paths each filtered by a discoid capacitive filter embedded in a capacitive filter array. A non-conductive, co-fired metal-ceramic substrate is formed from multiple layers that supports one or a plurality of substrate conductive paths and it is brazed to a conductive ferrule, adapted to be welded to a case, using a conductive, corrosion resistant braze material. The metal-ceramic substrate is attached to an internally disposed capacitive filter array that encloses one or a plurality of capacitive filter capacitor active electrodes each coupled to a filter array conductive path and at least one capacitor ground electrode. Each capacitive filter array conductive path is joined with a metal-ceramic conductive path to form a feedthrough conductive path. Bonding pads are attached to the internally disposed ends of each feedthrough conductive path, and corrosion resistant, conductive buttons are attached to and seal the externally disposed ends of each feedthrough conductive path.

US Patent:

6622046, Sep 16, 2003

Filed:

May 7, 2001

Appl. No.:

09/850331

Inventors:

Mary A. Fraley - Minnetonka MN
Ronald F. Hoch - Andover MN
George Johnstone - Brooklyn Center MN
Joseph F. Lessar - Coon Rapids MN
Lynn M. Seifried - Minneapolis MN
James Strom - Arden Hills MN

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 105

US Classification:

607 36, 607 37

Abstract:

Structures and methods relating to electrodes for incorporation into a feedthrough with a profile adapted for subcutaneous sensing of physiologic and cardiac signals. Electrode assemblies are adapted for integration with feedthrough to enable maximal electrode spacing, minimal myopotential electrical noise and provide reliable insulation from the IMD housing. Various structures and manufacturing processes are implemented to provide a large sensing surface with a low profile. The subcutaneous sensing electrode assembly provides a leadless sensing system and further enhances installation and follow-up procedures.

US Patent:

6660116, Dec 9, 2003

Filed:

Apr 18, 2002

Appl. No.:

10/124134

Inventors:

William D. Wolf - St. Louis Park MN
James Strom - Arden Hills MN
Craig L. Wiklund - Bloomington MN
Mary A. Fraley - Minnetonka MN
Lynn M. Seifried - Minneapolis MN
James E. Volmering - Phoenix AZ
Patrick F. Malone - Phoenix AZ
Samuel F. Haq - Mesa AZ

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

B32B 3126

US Classification:

156 8912, 156 8915, 156 8916, 156 8918, 156 8919, 156 8921, 361302, 607 5

Abstract:

A capacitive filtered feedthrough assembly is formed in a solid state manner to employ highly miniaturized conductive paths each filtered by a discoid capacitive filter embedded in a capacitive filter array. A non-conductive, co-fired metal-ceramic substrate is formed from multiple layers that supports one or a plurality of substrate conductive paths and it is brazed to a conductive ferrule, adapted to be welded to a case, using a conductive, corrosion resistant braze material. The metal-ceramic substrate is attached to an internally disposed capacitive filter array that encloses one or a plurality of capacitive filter capacitor active electrodes each coupled to a filter array conductive path and at least one capacitor ground electrode. Each capacitive filter array conductive path is joined with a metal-ceramic conductive path to form a feedthrough conductive path. Bonding pads are attached to the internally disposed ends of each feedthrough conductive path, and corrosion resistant, conductive buttons are attached to and seal the externally disposed ends of each feedthrough conductive path.

US Patent:

6884122, Apr 26, 2005

Filed:

Oct 25, 2001

Appl. No.:

10/045340

Inventors:

Scott J. Robinson - Forest Lake MN, US
John E. Kast - Hugo MN, US
Andrew J. Ries - Lino Lakes MN, US
Mary A. Fraley - Minnetonka MN, US
Jeffrey J. Clayton - Ramsey MN, US
Randy Roles - Crystal MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01R009/22

US Classification:

439722, 439885, 439909, 607128

Abstract:

An apparatus and method of electrically connecting components of an implantable medical device are disclosed. One embodiment is an apparatus having at least one electrical connector comprising a tab section and a housing at least partially enclosing the electrical connectors, wherein the housing is molded into sealing engagement with the electrical connectors and the tab section is capable of removal from the electrical connector after the housing is molded.

US Patent:

58702725, Feb 9, 1999

Filed:

May 6, 1997

Appl. No.:

8/852198

Inventors:

Lynn M. Seifried - Minneapolis MN
Joseph F. Lessar - Coon Rapids MN
William D. Wolf - Minneapolis MN
Mary A. Fraley - Minnetonka MN
Kevin K. Tidemand - East Bethel MN
David B. Engmark - Bethel MN
Ronald F. Hoch - Andover MN
Craig L. Wiklund - Bloomington MN

Assignee:

Medtronic Inc. - Minneapolis MN

International Classification:

H01G 435
H01G 4008

US Classification:

361302

Abstract:

A capacitive filter feedthrough assembly and method of making the same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by an electrically conductive combination of solder and brazing. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.

US Patent:

58673610, Feb 2, 1999

Filed:

Dec 18, 1997

Appl. No.:

8/994024

Inventors:

William D. Wolf - St. Louis Park MN
Mary A. Fraley - Minnetonka MN
Lynn M. Seifried - Minneapolis MN

Assignee:

Medtronic Inc. - Minneapolis MN

International Classification:

H01G 435
H01G 4008

US Classification:

361302

Abstract:

A capacitive filter feedthrough assembly and method of making the same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by electrically conductive adhesive or brazing, or a combination of adhesive and brazing. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.

US Patent:

60317108, Feb 29, 2000

Filed:

Dec 18, 1997

Appl. No.:

8/993974

Inventors:

William D. Wolf - St. Louis Park MN
Mary A. Fraley - Minnetonka MN
Lynn M. Seifried - Minneapolis MN
Ronald F. Hoch - Minneapolis MN

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 435
H01G 4008

US Classification:

361302

Abstract:

A capacitive filter feedthrough assembly and method of making same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by an electrically conductive combination of adhesive, brazing and soldering. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.